Graceful, noisy and impossible to forget, the Oriental pied hornbill is one of Cambodia’s most charismatic forest birds, gliding between fig trees and nesting in ancient hollows above temple ruins and village rice fields.
Cambodia’s forests are still home to some of Southeast Asia’s most spectacular birds, and few are as instantly recognizable as the Oriental pied hornbill, Anthracoceros albirostris (Khmer: កេងកងតូច keng kâng toch). With its oversized bill, yellow casque and bold black-and-white plumage, this species has become an emblem of healthy lowland forests across the region, including the Kingdom.
A widespread hornbill of Southeast Asia
The Oriental pied hornbill is one of the most common and wide-ranging hornbill species in Asia, occurring from the Indian subcontinent across mainland Southeast Asia to the Sundaic islands. Its distribution includes India, Nepal, Bhutan, Bangladesh, southern China, Myanmar, Thailand, Laos, Cambodia, Vietnam, Peninsular Malaysia, Singapore, Indonesia, Brunei and numerous offshore islands. This broad range has helped secure its global conservation status as Least Concern on the IUCN Red List, although local populations may be more vulnerable where forest is heavily degraded or hunting pressure remains high.
Within Cambodia, Oriental pied hornbills are most closely associated with lowland evergreen and semi-evergreen forest, riverine forest and wooded agricultural areas that retain tall trees. They are recorded from protected landscapes such as the Cardamom Mountains, the northern plains, and various lowland reserves, but they can also appear near villages where fruiting trees and remnant forest patches survive. Their tolerance of secondary growth and human-altered habitats is higher than that of many other hornbill species, which partly explains why they remain relatively common in parts of their range.
The Oriental pied hornbill is a medium-sized hornbill, measuring around 55-60 cm from bill to tail, with a wingspan of roughly 23-36 cm and a weight that typically falls between 600 and 1,050 g. Its head, neck, back, wings and upper breast are glossy black, often with a faint green sheen, while the lower breast, belly, thighs and undertail are white. The tail is mostly black but tipped with white, except for the central feathers, which remain entirely black.
The bill is long, down-curved and pale yellow, marked with black at the base, and topped by a prominent casque – a hollow, helmet-like structure unique to hornbills that acts as a resonating chamber for their loud calls. Bare skin around the eyes and throat is whitish to bluish, accentuating the bird’s expressive red or brown eyes. Males are generally larger, with brighter red eyes and a more massive casque, while females tend to have smaller bills and browner eyes.
In the field, Oriental pied hornbills announce themselves before they are seen. Their calls are variously described as cackling “kek-kek-kek” notes, braying grunts and harsh crackles or screeches, often given in excited series as they move between fruiting trees. The beating of their wings can also be surprisingly audible, producing a heavy whooshing sound as they fly across forest gaps.
Life in the canopy: diet and behavior
Like other hornbills, Anthracoceros albirostris is a canopy-dwelling frugivore that plays an important role as a seed disperser in tropical forests. Figs are especially favored, and birds often gather at fruiting strangler figs, sometimes sharing trees with barbets, pigeons and macaques. Their strong bills allow them to pluck fruits delicately, toss them into the air and swallow them whole.
Although fruit makes up the bulk of their diet, Oriental pied hornbills are opportunistic feeders and will also take insects, small reptiles, shellfish, and occasionally small birds or eggs. This omnivorous feeding strategy helps them cope with seasonal changes in fruit availability, particularly during the dry season when some forest trees stop fruiting. In agricultural landscapes, they may visit cultivated fruit trees, which can create memorable encounters for farmers and villagers, but also exposes the birds to persecution where wildlife is not appreciated.
One of the most remarkable aspects of hornbill biology is their nesting strategy, and the Oriental pied hornbill is no exception. The species nests in natural cavities high in large trees, often old-growth individuals that have developed suitable hollows over many decades. Once a pair selects a cavity, the female enters and the pair close almost the entire entrance with mud, fruit pulp and droppings, leaving just a narrow slit.
The female then remains sealed inside the cavity throughout incubation and the early growth of the chicks, relying entirely on the male to deliver food through the slit. She molts her flight feathers while in the nest, reducing her ability to escape if the tree is cut or disturbed, which makes hornbills extremely vulnerable to logging and disturbance at nest sites. Only when the chicks are large enough do the adults break open the seal, allowing the young birds to emerge into the canopy. This unusual nesting behavior creates a strong dependence on mature trees and stable forest conditions.
Conservation status and threats in Cambodia
Globally, the Oriental pied hornbill is assessed as Least Concern because of its wide distribution and locally abundant populations. However, in Cambodia the species still faces a combination of threats that could erode numbers if left unmanaged. Extensive deforestation for agriculture, economic land concessions and infrastructure development has reduced lowland forest cover, fragmenting habitat and removing the large trees required for nesting cavities.
Hunting and trapping also pose serious risks in some parts of mainland Southeast Asia, where hornbills may be taken for food, for decorative casques and feathers, or for the wildlife trade. Even when Oriental pied hornbills are not the primary target, snaring and opportunistic shooting can impact local populations. Because females are confined in nests for months at a time, the loss of a single large nesting tree can eliminate a pair’s breeding effort for an entire season.
On the positive side, the species’ ability to use secondary forests, riverine woodland and mixed agroforest landscapes gives it better prospects than more specialized hornbill species. Community-based conservation projects elsewhere in its range have shown that local people can successfully protect hornbill nesting trees, develop low-impact tourism and celebrate the bird as a symbol of forest health. Similar initiatives could help secure the Oriental pied hornbill’s future in Cambodia, particularly around protected areas and nature-based tourism destinations.
Oriental pied hornbills and Cambodian ecotourism
For birdwatchers and nature lovers, Cambodia offers excellent opportunities to encounter Oriental pied hornbills in both protected and community-managed forests. Their dramatic silhouette, noisy calls and social behavior make them especially appealing to visiting photographers and eco-tourists. When hornbills fly over a forest clearing at dawn, their wingbeats and calls create a powerful sense of being in a living, intact ecosystem.
Well-managed ecotourism can create tangible value for local communities, encouraging them to protect old trees and forest patches that provide nesting cavities and food sources. Guides and homestay owners who know where hornbills regularly feed or nest can build sustainable livelihoods around responsible wildlife watching. By promoting the Oriental pied hornbill as an ambassador species, Cambodia can highlight the richness of its lowland forests while reinforcing conservation messages for residents and visitors alike.
As the Kingdom continues to develop its tourism sector, integrating hornbill conservation into broader landscape planning will be vital. Protecting riverine corridors, maintaining fruiting tree diversity and safeguarding large nest trees offer practical steps that benefit not only hornbills but also many other forest-dependent species. The presence of loud, charismatic hornbills above rice fields and temple moats is a vivid reminder that cultural heritage and natural heritage are deeply intertwined.
